Question

21) If one-third of one-fourth of a number is 20, then three-tenth of that number
is ?​

Answer 1

Answer:

It's 12

Step-by-step explanation:

$x \frac{1}{3} \times x \frac{1}{4} = 20 \\ x = 400 \\ \\ so.x = 400 \times 3 \frac{1}{10} = 12$

Answer 2

Answer:

72

step by step explanation

unknown=x , 1/3×1/4×x=20

1/12x=20 take 1/12 to right side

x=20×12 =240

they ask 3/10 of the number the number is 240

3/10×240=72